Changing coolant on 1987 Pontiac fiero gt?

Answer 1

Place a pan under the drain valve on the radiator (back side of the radiator, right side) Reach up and open the valve letting the coolant out. (It is meant to be turned by hand, but you might need a pliers) After the coolant has started draining open the radiator cap to allow air into the radiator. Go back to the engine and open the thermostat cap (Large cap that looks like a radiator cap, has a two step turn - push and turn again removal). Remove the thermostat located under the cap by grabbing it, turning it to break the seal and pulling it up.

To fill - close the drain valve on the radiator. Leave the radiator cap off and start filling by pouring the coolant into the (still open) thermostat cap. Note - the thermostat needs to be still removed. Have an assistant watch at the radiator and when it gets full he needs to quickly put the radiator cap back on. Then continue to fill at the thermostat cap till the engine is full. Now start the car and let the coolant circulate, refilling at the thermostat cap when the coolant has dropped. After the car has warmed up, and all of the coolant bubbles have come out, fill the coolant to the top of the thermostat cap housing, replace the thermostat and cap and fill the reserve tank to the warm mark.